Mikel88 Posted February 20, 2021 Share Posted February 20, 2021 Trying to figure out what kind of algea this is or something else. My magnet scraper doesnt remove it at all. Tank has been running for 9 months. 37g with a nicrew light running 8 hours a day Link to comment Share on other sites More sharing options...
OceanTruth Posted February 21, 2021 Share Posted February 21, 2021 I would have guessed diatoms, but they usually aren’t that difficult to scrape off when I first had them. I’m sure someone else will give you a positive id. Good luck with dealing with it. Link to comment Share on other sites More sharing options...
Mikel88 Posted February 21, 2021 Author Share Posted February 21, 2021 I recently changed to 8 hours from 7 of light per day. Could that of caused this? Link to comment Share on other sites More sharing options...
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